This particular 389 is rocking the Paccar MX-13 inline-six turbodiesel, which is a 12.9-liter engine available with anywhere from 405 to 510 horsepower, and up to 1,850 lb-ft of torque.

The last Peterbilt Model 389 -- and the only model year 2025 -- ever built will be given away in a special sweepstakes put on by Rush Enterprises benefiting the Wounded Warrior Project.